Push-button switch for electric current



A. CESARO, PUSH BUTTON SWITCH FOR ELECTRIC CURREN ARPLICAUON man SEPT.23, 1919.

UNlTED STATES PATENT OFFICE.

ATTILIO CESAR/O, OF GENOA, ITALY.

PUSH-BUTTON SWITCH FOR ELECTRIC CURRENT.

A Application filed September 23, 1919.

To all whom it may concern Be it known that I, ATTILIO CEsARo, a

subject of the King of Italy, residing at Via end of a bundle of flexible elastic metal Napoli 13, Genoa, Italy, have invented certain new and useful Improvements in Push- Button Switches for Electric Current, of which the following is a specification.

This invention relates to electric switches of the push button'type its objectbeing to provide a very simple inexpensive construction in which a spring terminal actuated by the push button is caused with its free end to be engaged or disengaged from tlie free strips in contact with a second terminal so as to effect the closing and opening of the circuit.

invention.

Fig. 4 is a vertical sectional view ofan ord-inary one'circuitsuspension switch accordingto the present invention.

ig. 5 is a plan View of the lower half of the same.

Fig. 6 is a diagrammatical view of a four-pole swltch according to the present invention, for closingand opening a ma n eralistrips forming the bundle used in con- 4 Figs. 12, 13, 14: and 15 show diagramnection with a one circuit switch;

Fig. His 2. section onthe line 11 of vmatically and on a larger scale the four,

conditions produced by two consecutive pushes ofa one circuit swltch.

fastened together on one end, having however a special shape on their other free ends, where the coupling and the uncoupling with the spring take place, In'this part the two outer leaves 1' and 1 (Figs. 7,, 8,

9 and 10) are of the same height and arranged'on the same level with respect to the plane of the displacement of the spring.

. Besides the one of these outer leaves has Specification of Letters Patent.

Patented July 5, 1921.

Serial No. 325,789.

has in this part its upper edge situated so .as to correspond with the lower edge of the leaves 1 and 1", its lower edge however extending slightly over the travel described by the spring. i

There is now described the working of the coupling and uncoupling of the two elastic poles, as diagrammatically illustrated in Figs. 12, 13, 14: and 15. In effecting a first push on the button of, the switch (Fig. 12), the spring 2 with its free end slides along the wall of the switch, displacing the bundle 1 and before the end of the travel releases the leaf 1 which returns in its original position, while the leaves 1 and 1" remain displaced by the spring. In'liberating the button (Fig. '13 the spring 2, re-

leases the leaves 1" and 1". and in sliding over the leaf 1 stops within the bend of this leaf. In this mannerithe two elastic poles lremain engaged and theolosing of the circuit is effected. In pushingagain on the button (Fig. 14;) the spring 2 in traveling between the leaves 1' and 1" slides over the leaf 1 in releasing the leaf 1". y In liberating again the button (Fig. 15), the spring 2 returns in sliding over the leaf 1" in its original position resulting in the opening of the electric circuit.

In Flgs. 2 and 3 are illustrated a common wall switch in which 1 is the leaf bundle as above described, fixed with its one end on .the box 3 and in contact with the terminal clamp 4:; 2 is the spring also fixed against the box 3 and in contact with the terminal clamp '5, which spring by its free end and by pushing the button 6 can be engaged or disengaged with or from the leaf bundle as above described;

. Figs. 41 and 5' show a suspension switch In these figures the leaf bundle 1 con-. sists of the three leaves 1',-1,'1" which are in which the leaf bundle 1 is fixed upon a sleeve 7 fastened with the box 3 and in contact with the terminal'clamp 4; 2 is a spiral spring fixed against the box 3- and in contact with the terminal clamp 5 which spring in pushing the button 6 by its free end is engaged with or disengaged from the leaf bundle 1 as above described.

In Fig. 6 is illustrated a switch having four poles for the closing and opening of both conductors of a maincircuit, In this device the terminal clamps 8 and 8" bear each one a leaf bundle 1 as already described and the other terminal clamps 9 and 9 each one a spring 2 at .a Convenient distance from each other and controlled by a common button ,6.

In Figs. 1 and 11 there is illustrated a switch device having three poles allowing to lighten one or two groups of lamps inserted on two electric circuits. In this device the leaf bundle is fastened with its one end in 7 contact with the terminal clamp 4 while the first push of the button, the spring 2 recircuit is opened;

leasesthe two first leaves 1 and l while the other three 1", 1 and 1 remain displaced and the 4th leaf 1 coming in con-- tact with the sheet 10, whereby the closing of two circuits is effected. On the second push of the button 6; the 3rd and' lthleaf -1 and 1 are getting released and the circuit formerly established by spring 2 and sheet 10 openedi. On theth'ird push of the button 6, the spring'2 abandons entirely the leaf'bnndlc 1, whereby also the second 'I cla1m:

r- 1; An electric switch including a termihad, a spring connected to said terminal and having a free end, means for moving the free end of said spring, a 'second' termina'l, a bundle of conductor strips connected to the' second terminal and havingfree ends cooperating withthe' free end of said spring fonestablishfing an, electric circuit, said 1 strips being arranged side 'by 'side and one; '40

edge-of one of the outerstrips having an extension directed toward the other outer strip, the see end ofthe two outer strips being arranged opposite each other andthe free end of the '-;intermediate strip having its major portion arranged below -the lower j 'edgesof the'free ends offthe outerstrip's,

the free end of the spring when the operat- (111g means is actuated, being adapted to pass V I 7 ml clamp,lthef"f-ree ends of the two outer around theedge ofthe first IIiGIItlQIlQd'StIlP which is operative to the extension of said strip and then movedbetween the strip "havin'glthe extension and the intermediate strip *until it engages said-extension.

2. A switch of thekin'd defined by claim 1 in which two additional strips; are arranged alongside the bundle'of strips, one

' I of the additional stripsbeing provided with wan outward'lyextending portion, and-a third terminal having a bar designed tofbe engaged by the outwardly extending portion of one of said additional: strips. H

3. An electric switch including a first ter- V minal, a. spring connected'to said terminal [and having a movable free end, a push-' 'button engaging said spring for moving :its

free encha second terminal, three L-shaped stripsoonnectedto said second terminal and of the strip provided with the extension and whenireleased being automatically movable said spring on the second depression of said button being designed to pass downwardly between the intermediate stripjand the other outer stripto'release said spring from the strips. r

4. An electric pushbntton switch, including a first terminal, a spring connected to said tBI'IDIDLl; a push :button engaging said spring, a second terminal, a bundle of three strips connected to said second terminal and having a free endfengag'ed by a-free end of said spring, the free-ends of the two outer strips in thelpart where the connectionand disconnection takes place being'situated opposite each other anclxsubstantiallywithin the plane of movement of'the free end of the spring, one of theouter strips having ,its

"upper edge: provided with'an extension 'upwardlybetween the last mentioned strip and the intermediate strip, the free end of which is directed toward-the other strips, the

free end of the middle strip being-arranged below the upper edgesofthe 'othernsti'ips,

and the free end of the spring being adapted, when the push button is in'itially pressed,

to pass below, the free end of the strip1hav= 7 ing the extension and, When-the but'ton is released, to move upwardly between-the strip having the extension and the middle stri and en a e said extension. V b b 5. Anelectric push-button swtich includ ingaspring in .c'ontact with a terminal clamp and operated' by 'a push-button, the said spring having its free endengaged or'-dis-" engaged with the "free end-of abundleof three strips, in contact with a second termistrips in the part 'whereithe connection "and "disconnection takes place being {situated opposite each other i and substantially With- 7 the extension of the first stri-p,=th'e free end 7 oof the middle 7 strip atithi's ;-first; part being situat'edto correspond at its upper edgewith the, lower edge of theouter st'rips-andrte-e3 tend with its flower'edge beyond the travel "-of the spring, the arrangement being such 1 thation the button being pressed a first time t e elastic' prins e g g l"W thin me er; 1

tension of the strip so as to close the circuit, whereas on the button being pressed a sec- 0nd time the said spring is disengaged from the bundle and the circuit is opened.

6. An electric push button switch characterized by a thin plate in contact with a first terminal clamp and a spring in contact with a second terminal clamp and operated by a push-button, said spring havin its free end engaged with or disengaged rom the free end of a bundle of five strips in contact with a third terminal clamp, the free ends of the first, third and fifth strips at the part where the connection and disconnection takes place being situated opposite each other and substantially within the plane of the movement of the spring; one of the outer of these three strips being formed at its upper edge with an extension directed toward the inside of the bundle, the free ends of the two other strips at this part being however, so situated that their upper edges correspond with the lower edges of the three first mentioned strips and their lower edges extend beyond the travel of the spring; the arrangement being such that when the button is pressed a first time, the elastic spring, by its engagement with the extension, and by contact made between the bundle and the plate connected to the first terminal clamp, will close the two circuits; one circuit being operated by a second pressing of the button, and the second circuit also being opened by a third pressing of the button.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ATTILIO oEsARo.

Witnesses:

ADoLFo WEBER, N. P. SHOOKLEY. 

